* Fixed type error in getter

include/cppmp/misc/getter.inl

@@ -142,8 +142,8 @@ namespace cppmp
             {
                 using lambda_type        = T_lambda;
                 using lambda_traits_type = lambda_traits<lambda_type>;
-                using object_type        = typename lambda_traits_type::template argument_t<0>;
-                using value_type         = typename lambda_traits_type::return_type;
+                using object_type        = decay_t<typename lambda_traits_type::template argument_t<0>>;
+                using value_type         = decay_t<typename lambda_traits_type::return_type>;
 
                 lambda_type lambda;